This is driving me nuts. I installed a Rostra cruise control on my 2009 C-14 following the wiring diagram made by Fred Harmon and available on the Concours Owners Group forum. I have the Rostra 250-3592 panel-mount switch, with Engaged light. I installed relays for the Engaged light and for the negative brake sense line. The unit works, but.... If I leave the unit turned on, it stays on when I start the bike, but will not engage until I turn the unit off and then back on. This isn't a big deal, but.... When I first engage the unit, it will disengage with the brake, but it won't re-engage unless I turn the unit off and then back on. This situation lasts for a few minutes, and then the problem disappears and everything works. I have duplicated this behavior three times. I have checked the functionality of the control switch following the instructions in the manual, and all of the voltages on the servo side of the 4-pin connector check out. I cannot get the unit to go into Diagnostic Mode; the LED light remains lit. I've read that the NSS wire needs to be disconnected for the Diagnostic Mode to work, but I haven't tried that yet because I'd have to cut a wire. My main ground and brake-sense grounds are solid. All of my wire taps and splices are hard-wired solder joints covered by electrical tape or heat-shring tubing. Any suggestions would be greatly appreciated.